$(function(){
    var radius = 120;
    var dtr = Math.PI / 180;
    var d = 300;
    var mcList = [];
    var active = false;
    var lasta = 1;
    var lastb = 1;
    var distr = true;
    var tspeed = 10;
    var size = 250;

    var mouseX = 0;
    var mouseY = 0;

    var howElliptical = 1;

    var aA = null;
    var oDiv = null;

    var tagcloud = {
        /**
         *
         * @param {Object} options
         * options = {
		 * 	 cntr:qing-tag-cloud
		 *   tagElem:a
		 * }
         */
        amination: function(options) {
            var i = 0;
            var oTag = null;
            oDiv = document.getElementById(options.cntr);
            aA = oDiv.getElementsByTagName(options.tagElem);

            for(i = 0; i < aA.length; i++) {
                oTag = {};
                oTag.offsetWidth = aA[i].offsetWidth;
                oTag.offsetHeight = aA[i].offsetHeight;
                mcList.push(oTag);
            }

            tagcloud.sineCosine(0, 0, 0);
            tagcloud.positionAll();
            oDiv.onmouseover = function() {
                active = true;
            };
            oDiv.onmouseout = function() {
                active = false;
            };
            oDiv.onmousemove = function(ev) {
                var oEvent = window.event || ev;
                mouseX = oEvent.clientX - (oDiv.offsetLeft + oDiv.offsetWidth / 2);
                mouseY = oEvent.clientY - (oDiv.offsetTop + oDiv.offsetHeight / 2);
                mouseX /= 5;
                mouseY /= 5;
            };
            setInterval(tagcloud.update, 100);
        },

        update: function() {
            var a;
            var b;

            if(active) {
                a = (-Math.min(Math.max(-mouseY, -size), size) / radius) * tspeed;
                b = (Math.min(Math.max(-mouseX, -size), size) / radius) * tspeed;
            } else {
                a = lasta * 0.98;
                b = lastb * 0.98;
            }

            lasta = a;
            lastb = b;

            if(Math.abs(a) <= 0.01 && Math.abs(b) <= 0.01) {
                return;
            }

            var c = 0;
            tagcloud.sineCosine(a, b, c);
            for(var j = 0; j < mcList.length; j++) {
                var rx1 = mcList[j].cx;
                var ry1 = mcList[j].cy * ca + mcList[j].cz * (-sa);
                var rz1 = mcList[j].cy * sa + mcList[j].cz * ca;

                var rx2 = rx1 * cb + rz1 * sb;
                var ry2 = ry1;
                var rz2 = rx1 * (-sb) + rz1 * cb;

                var rx3 = rx2 * cc + ry2 * (-sc);
                var ry3 = rx2 * sc + ry2 * cc;
                var rz3 = rz2;

                mcList[j].cx = rx3;
                mcList[j].cy = ry3;
                mcList[j].cz = rz3;

                per = d / (d + rz3);

                mcList[j].x = (howElliptical * rx3 * per) - (howElliptical * 2);
                mcList[j].y = ry3 * per;
                mcList[j].scale = per;
                mcList[j].alpha = per;

                mcList[j].alpha = (mcList[j].alpha - 0.6) * (10 / 6);
            }

            tagcloud.doPosition();
            tagcloud.depthSort();
        },


        depthSort: function() {
            var i = 0;
            var aTmp = [];

            for(i = 0; i < aA.length; i++) {
                aTmp.push(aA[i]);
            }

            aTmp.sort(
                function(vItem1, vItem2) {
                    if(vItem1.cz > vItem2.cz) {
                        return -1;
                    } else if(vItem1.cz < vItem2.cz) {
                        return 1;
                    } else {
                        return 0;
                    }
                }
            );

            for(i = 0; i < aTmp.length; i++) {
                aTmp[i].style.zIndex = i;
            }
        },
        positionAll: function() {
            var phi = 0;
            var theta = 0;
            var max = mcList.length;
            var i = 0;

            var aTmp = [];
            var oFragment = document.createDocumentFragment();

            for(i = 0; i < aA.length; i++) {
                aTmp.push(aA[i]);
            }

            aTmp.sort(
                function() {
                    return Math.random() < 0.5 ? 1 : -1;
                }
            );

            for(i = 0; i < aTmp.length; i++) {
                oFragment.appendChild(aTmp[i]);
            }

            oDiv.appendChild(oFragment);

            for(var i = 1; i < max + 1; i++) {
                if(distr) {
                    phi = Math.acos(-1 + (2 * i - 1) / max);
                    theta = Math.sqrt(max * Math.PI) * phi;
                } else {
                    phi = Math.random() * (Math.PI);
                    theta = Math.random() * (2 * Math.PI);
                }
                mcList[i - 1].cx = radius * Math.cos(theta) * Math.sin(phi);
                mcList[i - 1].cy = radius * Math.sin(theta) * Math.sin(phi);
                mcList[i - 1].cz = radius * Math.cos(phi);

                aA[i - 1].style.left = mcList[i - 1].cx + oDiv.offsetWidth / 2 - mcList[i - 1].offsetWidth / 2 + 'px';
                aA[i - 1].style.top = mcList[i - 1].cy + oDiv.offsetHeight / 2 - mcList[i - 1].offsetHeight / 2 + 'px';
            }
        },

        doPosition: function() {
            var l = oDiv.offsetWidth / 2;
            var t = oDiv.offsetHeight / 2;
            for(var i = 0; i < mcList.length; i++) {
                aA[i].style.left = mcList[i].cx + l - mcList[i].offsetWidth / 2 + 'px';
                aA[i].style.top = mcList[i].cy + t - mcList[i].offsetHeight / 2 + 'px';

                aA[i].style.fontSize = Math.ceil(12 * mcList[i].scale / 2) + 8 + 'px';

                aA[i].style.filter = "alpha(opacity=" + 100 * mcList[i].alpha + ")";
                aA[i].style.opacity = mcList[i].alpha;
            }
        },

        sineCosine: function(a, b, c) {
            sa = Math.sin(a * dtr);
            ca = Math.cos(a * dtr);
            sb = Math.sin(b * dtr);
            cb = Math.cos(b * dtr);
            sc = Math.sin(c * dtr);
            cc = Math.cos(c * dtr);
        }
    }
    var options = {cntr:"qing-tag-cloud",tagElem:"a"}
    tagcloud.amination(options);

    $.ajax({
        url : "/view/page/newslimit.shtml",
        type : "get",
        cache:true,
        dataType : "json",
        success : function(data){
            var html = [];
            $.each(data.data,function(i,v){
                html.push('<div class="qing-item-list">');
                html.push('<a class="qing-item-link" href="/news/'+v.id+'.shtml">'+v.title+'</a>');
                html.push('<span>'+v.looknumber+'阅</span>');
                html.push('</div>');
            });
            $(".lastest-blogs").html(html.join(''));
        }
    })
})